Missing Teams graphics: it could be cache or it could be......
A recent case of intermittent DNS responses caused a little head scratching recently. Masking the issue was a few office 365 outages. In the end it was identified as an issue with a DNS server returning only IPv6 addresses. Not useful on an IPv4 network. PowerShell to the rescue and resolve-dnsname checking every few minutes and creating log files. A separate script hoovers these up and displays them nicely formatted in HTML for wider consumption. Simple but handy if needed. https://github.com/JonathanChristie-BHIT/DNSChecker Using a mixture of internal and external DNS servers to check a few entries PowerShell snippet: [array]$DNSServers = @( ('192.168.0.1', 'Internal'), ('8.8.4.4', 'Google A'), ('8.8.8.8', 'Google B'), ('1.1.1.1', 'Cloudflare A'), ('1.0.0.1', 'Cloudflare B'), ('208.67.222.222', 'OpenDNS A'), ('208.67.220.220', 'OpenDNS B') ) [ar